Before AX2012, the only table used for
recording all the inventory transactions was InventTrans. In AX2009, a lot of data in InventTrans is either redundant or fields are used to represent a
specific type of transaction like sales, purchase, transfer etc.

In AX2012, the base is still the same i.e.
every inventory still gets recorded in the InventTrans but the only difference is that the table has been
more normalized now. A new table has been added called InventTransOrigin which is
actually now holding the relationship between the originating tables
(transaction tables) and InventTrans.
The InventTransId, TransType and TransRefId have now been removed from the InventTrans and moved to the InventTransOrigin
table with names InventTransId, ReferenceCategory and ReferenceId respectively.

Every transaction has now its own InventTransOrigin table. For example,
in case of PurchLine the table named
is InventTransOriginPurchLine which
is actually referring to InventTransOrigin through
the InventTransId field. Transaction
tables like PurchLine, SalesLine, ProdLine etc. still contains InventTransId
field but it not recommended to use/refer them. It is expected to be
depreciated in future.